<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>OnMouseOver Demo</title>
  </head>
  <body>
    <img
      src="tick.gif"
      alt="tick"
      onmouseover="this.src='tick2.gif';"
      onmouseout="this.src='tick.gif';"
    />
  </body>
</html>
